|
The range statement relates to the unit of competency as a whole. It allows for different work environments and situations that may affect performance. Bold italicised wording, if used in the performance criteria, is detailed below. Essential operating conditions that may be present with training and assessment (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) may also be included. |
Scope of work: | includes:interpretation of plans and specificationsrainfall analysissizing and documenting layout of rainwater harvesting systems for applications, including residential, commercial and industrialvolume calculationsmay be for new projects or an existing structure being renovated, extended, restored or maintained. |
Design requirements include: | architectural specificationsbuilder specificationsowner requirementsspecialist water use applications. |
Contamination includes: | bacterialheavy metalinorganicodourorganictasteviral. |
Cost-benefit analysis includes: | comparison of range of suitable materials and system choices available to enable cost-effective choices to be made without compromising integrity of project. |
Statutory, regulatory requirements and Australian and New Zealand standards include: | Acts and regulationsAS/NZS3500 National plumbing and drainage setAS2200 Design charts for water supply and sewerageBuilding Code of Australialocal and state government policies, including group and strata titling. |
Manufacturer requirements include: | material specificationspump tablessizing tablestechnical and trade manuals. |
Desktop study includes collection and interpretation of existing data for design purposes from: | architectural and building planscouncil plansdeveloper plansmanufacturers' dataother documents, including:applicationsformssewer detail mapsother reports as available. |
Performance requirements include: | pipe grades, cover, flow conditions and discharge requirements, established using Australian and New Zealand standards and local authority plans. |
Tank type and location include: | tank type:coloured steelconcretefibreglassgalvanised steelplasticpolyethyleneother approved materialstank location:above-groundin-groundreduced levelssite plan. |
Layout of pipework systems: | includes:gravity systemspumped systemsshould not unduly affect building integrity and aesthetic appealshould have principles of economy, serviceability, durability and fit for use applied. |
Fittings and valves include: | backflow prevention devicesbendsinspection openingsisolating valvesjunctions. |
First-flush systems include: | electronicfloat-activatedmanualmechanicaltime-activatedvolume-activated. |
Strainers include: | downpipegutterpoint of usepump inletpump outlettank inlettank outlettap. |
Water contamination solutions include: | chlorinationdisinfectionfiltersozonereverse osmosisscreensstrainersultraviolet. |
Pipe size and pipe grade calculations include: | determination of flowgradient calculationsinterpretation of design charts and tablespipe sizing calculationsreduced level calculations. |
Pipe fixings include: | anchorsbeddingbracket spacingconcrete supportcorrosion protectioncoverhanging bracketsmaterial requirementssaddleswall and ceiling brackets. |
Materials include: | concretecopperfittings and fixtureshigh density polyethylene (HDPE)low density polyethylene (LDPE)unplasticised polyvinyl chloride (PVC-U). |
Jointing methods include: | brazingcompressiongluingmechanical jointssolvent cementthreadingwelding. |
Pump and pump control requirements include: | automatic controlscapacitycorrosion-resistant materialsdetailinghigh and low-level water controls and alarmsimpeller sizinginlet and outlet designinstallationmountingpump selection and pump sizing, which is based on:flowvelocityliftpressure requirementsvalvewarning system. |
Installation requirements include: | beddingclippingconcrete supportindependent anchoring of above-ground and in-ground tanksinstallation detailsjointinglevel of workmanship. |
Rainwater re-use systems include: | irrigation applicationslaundry applicationspotable re-usetoilet flushingwash-down applications. |
Plans include: | axonometricscross-sectionsdetailselevationsisometricsschematics, which may be produced using:pencilIndian inkpigment linercomputer generationsections. |
Specification includes: | beddingclippingconcrete supportdetailing specialised componentsjointingmanufacturer requirementsmaterialsworkmanship. |
Testing includes: | air pressure testhydrostatic testquality assurance (QA) audit. |
Commissioning schedule includes: | flow adjustmentsflushing systemleak checkpressure testingpump adjustmentswater filling in-ground tanks. |
Operation and maintenance manual includes: | cleaning filters and strainersdisinfection of storage tanksleak detectionpump maintenanceregular maintenance requirementswater auditingyearly inspections. |